Home / 3,891.08-5,369.82-2,122.86

Finding the Fourth Proportional to 3,891.08, 5,369.82 and 2,122.86

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Solution

The fourth proportional to 3,891.08, 5,369.82 and 2,122.86 is: 2,929.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.08 : 5,369.82 = 2,122.86 : x
  2. Step 2: Convert to fraction form
    3,891.08/5,369.82 = 2,122.86/x
  3. Step 3: Cross multiply
    3,891.08x = 5,369.82 × 2,122.86
  4. Step 4: Simplify right side
    3,891.08x = 11,399,376.09
  5. Step 5: Solve for x
    x = 11,399,376.09/3,891.08
  6. Step 6: Final answer
    x = 2,929.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.